The Tc module subdivides the sites of a basin in the 9 topographic classes identified by the
longitudinal and transversal curvatures.
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<h3>Inputs</h3>
<ul>      
<LI>The !GridCoverage containing with the longitudinal curvatures;</LI>
<LI>The !GridCoverage containing with the normal curvatures;</LI>
<LI>The threshold value for the longitudinal curvatures;</LI>
<LI>The threshold value for the normal curvatures;</LI>
</ul>
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<h3>Output</h3>
The program produces two different output matrixes, one with the 9 classes schematized conventionally in the following way:
<UL>
<LI>10 planar -planar sites </LI>
<LI>20 convex-planar sites </LI>
<LI>30 concave- planar sites </LI>
<LI>40 planar- convex sites </LI>
<LI>50 convex-convex sites </LI>
<LI>60 concave-convex sites </LI>
<LI>70 planar-concave sites </LI>
<LI>80 convex-concave sites </LI>
<LI>90 concave-concave sites. </LI>
</UL>
The second output file contains an aggregation of these classes in the three fundamentals (concave, convex and planar sites),
indexed as follows:
<UL>
<LI>15 concave sites (classes 30,70, 90) </LI>
<LI>25 planar sites (class 10) </LI>
<LI>35 convex sites (classes 20, 40, 50, 60, 80). </LI>
</UL>
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<h3>References</h3>
<ul>
<li>[Bibliography#17, 17],  A. Parsons, 1988</li>
</ul>
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